The original question was: Since snails live both in water and on land when did God make snails? As some land snails seem to go underwater, are snails at the sea side and the snails in my garden the same sort of thing, or can all snails do that? Simon Terry has provided a very well illustrated answer to this question. Below is our summary below with a link to Simon’s full answer (PDF article) at the end. The short answer is no, they are not the same. Land snails and sea snails are grouped together and called Gastropods, and they do have many similarities, but they also have some important differences, specially in how they breathe, that enable us to separate them into two distinct groups: the sea snails which breath under water (technically referred to as ‘Prosobranchs’), and those that live on land or freshwater and breathe air referred to as the ‘Pulmonates’). One big difference between these two groups is the breathing apparatus. The word ‘Prosobranch’ is derived from the Greek proso meaning forward and branchia meaning gills. Sea snails therefore breathe underwater using a gill which can extract air directly out of the water. Whelks for example use their siphon (a soft tube like structure) to draw water into the mantle cavity, where the gill takes in oxygen and expels carbon dioxide. Land and freshwater dwelling snails breathe with a lung, and take in air through an opening called a respiratory pore. Pond snails have a tube-like pore that they use like a snorkel to take in air when they are submerged. Land snails and slugs can partly submerge themselves in periods of drought, but prefer to escape water if they can. Some may even forage for food just beneath the water’s surface but must return to the land as their design and function is for terrestrial (land based) life. There are also some other differences that show how each kind of snail is well designed for the habitat it lives in, such as their eyes, and whether they have an operculum (a lid for their shell opening). To learn more on how marine and land snails show good evidence of Biblical creation, and how the fascinating differences between them tell us they are separate kinds, see Simon Terry’s article Land and Sea Snails: Separate Creations. PDF here For more information on snails see the question: What is the Snail Evolution project in British Schools, and what does the evidence show? Answer here.
About The Contributor
Simon Terry became a Christian when he was 18 after reading about Jesus Christ in literature he had received at a Gospel meeting in his childhood. Shortly after his conversion, he studied for a BEd (HONS) degree at the University of Wales College Newport. After qualifying in the year 2000 he worked for the London City Mission for seven years, working first of all mainly amongst youth, and then on to another rough housing estate in North West London. For three of those years he also supported a ministry in Covent Garden, amongst those who believe in the new age philosophy, through a literature table. In 2007 he left London for Leicester to join Answers in Genesis UK/Europe as a speaker for the ministry. Since 2009 he has been working as an evangelist in four parts of Leicestershire. Here he concentrates his time on door to door evangelism on the four districts and a literature table in his local town centre. He is currently working on a book for this work entitled Questions of Life Answered, and still takes the opportunity to speak on the subject of creation. Simon is married to Yvonne with two children, Judah and Seren. Simon’s long term interest in slugs and snails stems from a childhood fascination. Their distinctive design, variability and extraordinary way of life greatly intrigue him. Fifteen years ago he began studying the autecology of Helix pomatia in the south of England and hopes one day get his work published as part of his task of refuting the evolutionary thinking that so dominates this field of study, giving the glory back to the Creator.